Sun Microsystems StorEdge Network Data Replicator 3 User Manual

Sun StorEdg e

™

Network Data Replicator 3.0

Config uratio n Gui de

Sun Microsystems, Inc. 901 San Antonio Road Palo Alto, CA 94303-4900 U.S.A. 650-960-1300

Part No. 806-7550-10 June 2001, Revision A

Send comments about this document to: docfeedback@sun.com

Thisproduct or documentisprotected by copyright anddistributed underlicensesrestrictingits use, copying, distribution,and decompilation.No part ofth is product ordocumentmay be reproducedin any form by anymeanswithout prior writtenauthorization of Suna nd its licensors,if any.Third-partysoftware,includingfonttechnology,is copyrighted andlicensed fromSun suppliers.

Partsof thep roduct may be derived fromBerkeleyBSD systems,licensed from the University of California.UNIX is a registeredtrademark in the U.S. and other countries, exclusively licensed through X/Open Company, Ltd.

Sun, Sun Microsystems,theSun logo, Sun StorEdge, Sun Enterprise, Solstice Disksuite, Sun Trunking,SunScreen,AnswerBook, and Solaris are trademarks, registered trademarks, or service marks of Sun Microsystems, Inc. in the U.S.and other countries.

The OPEN LOOKa nd Sun™ Graphical User Interface was developed byS un Microsystems, Inc. for itsusers and licensees. Sun acknowledges the pioneering efforts of Xerox in researching and developing the concept of visual or graphical user interfaces for the computer industry.Sun holds a non-exclusive license fromXerox to the Xerox Graphical User Interface, which license also covers Sun’s licensees who implement OPEN LOOK GUIs andotherwisecom p ly with Sun’s written license agreements.

RESTRICTEDRIGHTS: Use,d uplication, or disclosureb y the U.S. Government is subject to restrictionsof FAR 52.227-14(g)(2)(6/87)and FAR52.227-19(6/87),o r DFAR252.227-7015(b)(6/95) and DFAR227.7202-3(a).

DOCUMENTATIONIS PROVIDED “AS IS” AND ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING A NY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT, ARE DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD TO BE LEGALLY INVALID.

Copyright 2001SunMicrosystems, Inc.,901San AntonioRoad• Palo Alto, CA 94303E tats-Unis.Tousdroitsréservés. Ce produit ou document est protégé par un copyright et distribué avec des licences qui en restreignent l’utilisation, la copie, la distribution, et la

décompilation.Aucune partiede ce produitou document nepeut être reproduitesous aucuneforme, par quelquemoyen que ce soit,sans l’autorisation préalable et écrite de Sun et de ses bailleurs de licence, s’il y en a. Le logiciel détenu par des tiers, et quicomprend la technologie relativeaux polices de caractères, estprotégé par un copyrightet licencié par des fournisseursde S un.

Des parties de ce produit pourront être dérivées des systèmes Berkeley BSD licenciés par l’Université de Californie. UNIX est unemarque déposée auxEtats-Unis et dansd’autres pays et licenciée exclusivement par X/Open Company, Ltd.

Sun, Sun Microsystems,le logo Sun, Sun StorEdge, Sun Enterprise, Solstice Disksuite,Sun Trunking,SunScreen, AnswerBook, et Solaris sont des marquesde fabrique ou des marques déposées,ou marquesde service, de Sun Microsystems,In c. aux Etats-Unis et dans d’autrespays. Toutesles marques SPARC sontutilisées sous licence et sont des marques defabrique ou des marques déposées de SPARC International, Inc. auxEtats-Uniset dansd’autrespays. Lesproduitsportantles marques SPARCsontbasés sur unearchitecturedéveloppéepar Sun Microsystems,Inc.

L’interfaced’utilisation graphique OPEN LOOK et Sun™ a été développée par Sun Microsystems, Inc. pour ses utilisateurs et licenciés. Sun reconnaît les efforts de pionniers de Xerox pour la recherche et le développement du concept des interfaces d’utilisation visuelleou graphique pour l’industrie de l’informatique. Sun détient une licence non exclusive de Xerox sur l’interface d’utilisation graphique Xerox, cette licence couvrant également les licenciés de Sun qui mettent en place l’interface d’utilisation graphique OPEN LOOK et qui en outre se conforment aux licencesécrites de Sun.

CETTE PUBLICATION EST FOURNIE "EN L’ETAT" E T AUCUNE GARANTIE, EXPRESSE OU IMPLICITE, N’EST ACCORDEE, Y COMPRIS DES GARANTIES CONCERNANT LA VALEUR MARCHANDE, L’APTITUDE DE LA PUBLICATION A REPONDRE A UNE UTILISATION PARTICULIERE, OU LE FAIT QU’ELLE NE SOIT PAS CONTREFAISANTE DE PRODUIT DE TIERS. CE DENI D E GARANTIE NE S’APPLIQUE RAIT PAS, DA NS LA ME SURE OU IL S ERAIT TENU JURIDIQUEMEN T NUL ET NON AVENU.

Please

Recycle

Preface v

1. Overview 1

Sun SND R Software Description 1 Supported Hardware an d Software 3

TCP/IP Connection Hardware Components 3

Network M ultipathing 4 Applications 5 Architecture 5

2. Configuration Considerations 7

Volumes Eligible fo r Replication 7

Choosing Volume Level Protection 8 Bitmap Vo lumes for Scoreboard Log s 8 Choosing a Connection Medium to Link My Sites 9

ATM Link Advantages 9

Configuring Redundant Links Bet ween Sites 10

Link Security 10 Choosing Be tween Synchr onous and Asynchronous Replicati on 11

When To Suspend Replication to th e Secondary Site 12

iii

Configuring The Sun SNDR Software for Mutual Replication 12 Order-Dependent Writes and Volume Set Grouping 13 Recovery Considerations 14

Failing Over to th e Secondary Site 14

Recovering the Primary or Secondary Site 14

Using The Sun SNDR and Sun StorEdge Instant Image Software 16 Sun SND R Software and Sun Sto rEdg e Fast Write Cache Software 17

One-to-Many and Multihop Volume Sets 18 Using The Sun SNDR Software in a Firewall Environment 19

iv Sun StorEdge Network Data Replicator 3.0 Configuration Guide • June 2001

Preface

The Sun StorEdge Network Data Replicator 3.0 Configuration Guide describes the Sun StorEdge™ Network Data Replicator (Sun SNDR) software and general information about its use. This guide is intended for system administrators who have experience with the Solaris™ operating environment and related di sk storage systems.

Before You Read T his Book

To f ully u se the info rmat ion in this document, you must have thorough knowledge of the topics discussed in these books:

■ Sun S torEdge Network Data Replicator 3.0 System Administrator’s Guide

■ Sun StorEdge Network Data Replicator 3.0 Installation Guide

■ Sun StorEdge Network Data Replicator 3.0 Release Notes

The Sun SNDR softwa re must be installed as described in the inst allation and release documentation.

Using UNIX Commands

This document may not contain in formation on basic UN IX®commands and procedures such as shutting down the system, booting the system, and configuring devices.

Refer to the software documentation that you received with your system.

Documentation Conventions

Typeface or Symbol Meaning Examples

AaBbCc123 The names of commands,

files, and directories; on-screen compu ter output.

AaBbCc123

AaBbCc123 Book titles, new words or

[ ] In syntax, brackets indi cate

{ arg | arg} In syntax, br aces and pipes

What you type, when contrasted wi th on-screen computer output .

terms, words to be emphasized. Command-line variable; replace with a real name or value.

that an argument is optional.

indicate that one of the arguments must be specified.

Edit your .login file. Use ls -a to list all files.

% You have mail. % su

Password:

Read Chapter 6 in the User’s Guide. These are called class options. You must be root to do this. To delete a file, type rm f ilen a m e.

scmadm [–d sec][–r n[:n][,n]...] [–z]

sndradm -b

{phost | shost}

vi Sun StorEdge Network Dat a Replicator 3.0 Configuration G uide • June 2001

Shell P romp t s

Shell Prompt

Cshell machine_name% Cshellsuperuser machine_name# Bourne shell and Korn shell $ Bourne shell and Korn shell superuser #

Accessing Sun D ocume nta tion Online

A broad selection of Sun system documentation is lo cate d at:

http://www.sun.com/products-n-solutions/hardware/docs

A compl ete set of Sola ri s documentati o n and many other titles are located at:

http://docs.sun.com

For the latest version of released storage sof tware documentatio n, go to:

http://www.sun.com/products-n-solutions/hardware/docs/Software/

Ordering Sun Do cumentation

For the latest version of storage software documentation, go to:

http://www.sun.com/products-n-solutions/hardware/docs/Software/

Fatbrain.com, an Internet professional bookstore, s tocks select product documentation from Sun Microsystems, Inc.

For a list of documents and how to order them, visit the Sun Documentation Center on Fatbrain.com at:

http://www.fatbrain.com/documentation/sun

Sun Welcomes Your Comments

Sun is interested in improving its documentation and welcomes y o ur comments and suggestions. You can email your comments to Sun at:

docfeedback@sun.com

Please include Part N o. 806-7550-10 in the sub ject line of your email.

Preface ix

+ 21 hidden pages

Sun Microsystems StorEdge Network Data Replicator 3 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents